DKS 1815-292 AWID proximity card reader (4 inch read range) on a surface mount enclosure that also includes a DKS DoorKing 2351-010 tracker expansion board. Contactless smart cards that can be read without inserting them into a reader device. They work by reading the credentials of a token or prox card with it's within the detection radius. Rely on radio frequency (RF) to communicate with the card. 26-bit Wiegand format.